Date of Award
2-2011
Document type
dissertation
Access Type
Open Access Dissertation
Degree Name
Doctor of Philosophy (PhD)
Degree Program
Electrical and Computer Engineering
First Advisor
Massimo V. Fischetti
Second Advisor
Eric Polizzi
Third Advisor
Neal Anderson
Subject Categories
Electrical and Computer Engineering
Abstract
Electronic band structure of various crystal orientations of relaxed and strained bulk, 1D and 2D confined semiconductors are investigated using nonlocal empirical pseudopotential method with spin-orbit interaction. For the bulk semiconductors, local and nonlocal pseudopotential parameters are obtained by fitting transport-relevant quantities, such as band gap, effective masses and deformation potentials, to available experimental data. A cubic-spline interpolation is used to extend local form factors to arbitrary q and the resulting transferable local pseudopotential V(q) with correct work function is used to investigate the 1D and 2D confined systems with supercell method. Quantum confinement, uniaxial and biaxial strain and crystal orientation effects of the band structure are investigated. Regarding the transport relavant quantities, we have found that the largest ballistic electron conductance occurs for compressively-strained large-diameter [001] wires while the smallest transport electron effective mass is found for larger-diameter [110] wires under tensile stress.
DOI
https://doi.org/10.7275/1924728
Recommended Citation
Kim, Jiseok, "Band Structure Calculations of Strained Semiconductors Using Empirical Pseudopotential Theory" (2011). Open Access Dissertations. 342.
https://doi.org/10.7275/1924728
https://scholarworks.umass.edu/open_access_dissertations/342